Unlike the first portions of the Dating key (Questions #1 through #3 on the main Bottle Dating page; #4 through #7 on the Mouth-blown bottles portion of the dating key), each question on this page is an independent dating tool for which have a peek here the response is not predicated on the outcome of any of the other questions. Thus, such concerns do not need to be considered managed. The question numbers on this page continue where they left off on the mouth-blown bottle portion of the key.
Matter #8 : Is the package mug color aqua (aquamarine otherwise extremely light green), essentially colorless (clear), otherwise a color other than colorless otherwise aqua?
Concern #10 : Really does the fresh bottles feel the after the statement embossed on the front side otherwise toward legs? Government Rules Forbids Revenue Otherwise Recycle Of Container
Concern #eleven : Really does new bottle ft features similar marks to the people to the container envisioned? (These markings are those of the Owens-Illinois Cup Providers.)
Machine-generated bottles having colorless glass can also be big date out of anytime immediately following 1905, however, there is a comparatively credible dating crack it is possible to considering the sort of colorless cup
Question #several : Do the newest bottles has actually an-end (lip) that was closed which have good cork, shut having an externally threaded fuck limit, or close with different particular closing?
Question #14 : Really does the bottles enjoys a beneficial shallowly incised network to your legs that is (usually) ranging from step one/3″ to 3/4″ (10-18mm) in the diameter?
Question #17 : Really does all the otherwise area of the package base enjoys a great distinctive trend, we.e., stippling otherwise knurling?
Read through all the questions to see which provides pertinence to the container you need to go out. Keep track of the symptomatic feature date range listed in for each and every concern your consult, and when towards the avoid of one’s page, have fun with one to pointers to look for the most likely manufacturing big date a number of the package.
Like with mouth-blown package, far more perfect relationships regarding a server-made package you are able to do with a few believe that with that or even more of the numerous symptomatic provides detailed throughout the questions in this post
Given that informed me in past times a lot more than, know that the newest 1905 “earliest” big date utilized in all the questions is not absolute. There have been certain greater lips, semi-automated host lead bottles (albeit a very reduced percentage) which had server-generated characteristics (minus a suction scar) than can also be go back as early as the brand new middle-1890s.
A great. Container made from aqua glass – A machine-made bottle made of aqua glass – which is not a soda bottle or canning jar – is most likely to date from or prior to the 1920s.
Click on Groves Chill Tonic to access an image of an aqua healing on 1910-1920 point in time. (This new bottle envisioned involved #9 lower than with an array of bubbles on the glass manage meet the requirements a particular deep colour of aqua.) The level of aqua cup bottle lead refuses during this era in order that from the mid so you’re able to late 1920s the brand new prominent color to possess server-made package (excluding soda container and canning jars) are colorless or emerald. Aqua more or less disappears by early 1930s since a bottle color on famous different out of soda bottles (and lots of canning containers) and this stayed produced in individuals hues regarding aqua right up up to modern times (Miller & McNichol 2002,2010; empirical observations). Regal Crown Cola, Dr. Pepper (both an excellent greenish aqua), and you can Coca-Cola (“Georgia Eco-friendly”) is familiar samples of later point in time aqua container (Toulouse 1971). More resources for it color, simply click aqua to consult with its description toward Container Colors webpage.
B. Container are regarding mainly colorless (aka “clear”) glass In the production of colorless glass numerous methods – mechanical, physical, and/or chemical – were used to decolorize glass (Tooley 1953). Decolorizing is in essence neutralizing the effects of the iron and carbonaceous impurities in the glass mix in order to obtain as colorless of glass as possible. The primary physical (masking) agents used in the first half of the 20th century were manganese dioxide, selenium, and arsenic. All potentially leave a very slight residual color to the glass that is usually visible when looking closely at the thickest portion of the base or sides. For more information click colorless glass to go to that section of the Bottle Colors page.